TagJet (formerly Actual Tag Editor)

TagJet is the spreadsheet MP3 tag editor that can identify tracks and entire albums and then automatically add to them tags, album art and lyrics. As well as it has wide capabilities of manual editing and ability to make all operation in batch.
In the spreadsheet you can modify randomly selected group of tag fields simultaneously. Also you can manipulate entire tags and synchronize their different versions. At your disposal is the multi-level undo/redo and selective saving which add comfort and prevents damage of tags.
Tags can be filled using information from file names, and of course files can be renamed using tags. There are abilities to change tags encoding, rate your songs and create playlists. In addition you get a convenient view of your tags. TagJet supports all versions of ID3 and Lyrics3 tags. TagJet provides you with an user-friendly interface that makes it suitable for any kind of user.Limitations in the unregistered version30 days trial
Saves only 15 files during a working session
Nag screen for 10 seconds at program startup